Educated at Wellington College, Guys Hospital and Britannia Royal Naval College Dartmouth. Medical career in general practice overseas and at sea, then NHS radiology training. Consultant Interventional Radiologist, Defence Consultant Adviser in Radiology, Faculty Board Royal College of Radiologists, extensive research & academic portfolio. Hospital Doctor of the Year 1999. Operationally deployed Gulf War and Iraq War. Commanding Officer Royal Hospital Haslar. Executive Director Portsmouth Hospitals NHS Trust. Director Medical Policy MOD 2006-08, Assistant Chief of Defence Staff (Health) as Surgeon Rear Admiral 2008-12, overseeing military medical operations Iraq & Afghanistan. Medical Director General (Naval), Honorary Surgeon to Her Majesty The Queen 2006 – 12. Chief Executive & Medical Director Qatar Heart Hospital 2012-15. Since 2016 Prior of The Priory England & The Islands of The Venerable Order of St John of Jerusalem and Chair of St John Ambulance. Deputy Lieutenant County of Hampshire. Freeman City of London. Yachtsman & Cresta rider.

Major General Marc Overton has been an Army Reservist since joining 35 Signal Regiment in 1987 as a private soldier.  Commissioned in 1991 while at Exeter University Officer Training Corps, he then joined The London Regiment, the Capital’s Reserve Infantry Regiment.  Upon completing a number of Regimental appointments, he moved to London University Officer Training Corps as Second in Command.  On promotion to Lieutenant Colonel he moved to HQ LONDIST with responsibility for Community Engagement and Recruiting before taking over as Commanding Officer of The London Regiment in 2010. Promoted to Colonel in 2012 he worked in Army HQ, responsible for the Reserve component of the Army 2020 personnel strategy.  In June 2015 he was appointed Commander Commissioning Pipeline, responsible for generating all Regular and Reserve Officers into RMAS. Promoted to Brigadier he was the Deputy of Army Recruiting and Initial Training Command before becoming Head Strategy Reserves responsible for the Army Reserve input into the Integrated Review.  Given his civilian career he was also advisor to the Deputy Chief of the General Staff and the Executive Committee of the Army on the digital transformation of the British Army.  He is now Assistant Chief of the Defence Staff (Reserves and Cadets), UK Defence’s senior Reservist.

In his civilian career Major General Overton has run international technology businesses across a variety of industries.

A Deputy Lieutenant of Greater London and a Vice Patron of the Royal British Legion Poppy Factory, he is also the Regimental Lieutenant Colonel of the 1^st Battalion London Guards, the antecedent unit of The London Regiment.  He has two sons and lives in Ascot.